Decorative Panel Attachment Structure for Crack and Squeak Prevention
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Solution Overview
Problem
Decorative panels for motor vehicles face issues with cracking and squeaking noise due to direct fixing methods, which also increase assembly complexity and require additional elements, leading to increased production time and potential damage.
Innovation Solution
The implementation of local extra thicknesses in the decorative film, main body, or protective layer, made from materials like polymethyl methacrylate or polycarbonate, to reinforce the fixing zone and reduce contact between materials, thereby preventing cracking and squeaking, while maintaining a seal between elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If direct fixing methods are used to attach parts to the decorative panel, then assembly is simplified, but cracking and squeaking noise occur due to contact between the panel and fixing means
Solution Approach 1:
The patent applies local quality by creating zones of different thickness in the decorative panel. Specifically, the panel has a first zone with greater thickness at the fixing location and a second zone with lesser thickness elsewhere. This localized thickness variation provides structural reinforcement exactly where the fixing means contacts the panel, preventing cracking and reducing squeaking noise, while maintaining the overall simplicity of the direct fixing method.
2Object-generated harmful factors
If seals or elastomer washers are used to prevent squeaking, then noise is reduced, but assembly complexity increases and production time increases
Solution Approach 1:
The patent merges the noise reduction function into the panel structure itself by creating a thicker first zone that provides both structural support and noise damping. This eliminates the need for separate seals or elastomer washers, as the thickness variation in the panel material itself serves to prevent squeaking while maintaining assembly simplicity.
3Adaptability or versatility
If frames are added to the decorative panel, then mounting flexibility is improved, but the final surface area increases which is not always desired
Solution Approach 1:
The patent segments the panel into functional zones based on thickness: a first zone with greater thickness for fixing and a second zone with lesser thickness for the visible surface. This segmentation allows the panel to serve multiple functions (structural support, noise reduction, aesthetic appearance) without requiring additional framing elements, thus maintaining a compact surface area while providing mounting flexibility.
Data Source
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AI summary
The invention relates to a decorative panel (10) for a motor vehicle, comprising a main body (20) made of transparent or translucent plastic material, a decorative film (30) on a decorated face (22) of the main body (20), and a protective layer (40) on an opposite face (24) from the decorated face (22), characterized in that the decorative panel (10) comprises at least one region (50) for attachment of a part to the decorative panel (10), and in that the decorated face (22) and/or the opposite face (24) comprise localized thickened portions (60) at said attachment region (50).